期刊
INORGANIC CHEMISTRY
卷 54, 期 23, 页码 11362-11368出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.5b02324
关键词
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资金
- NNSF of China [21361011, 21101081, 21561015]
- NSF of Jiangxi [20151BAB203002]
- Young Scientist Training Project of Jiangxi Province [20153BCB23017]
- project of Education Department of Jiangxi [GJJ14235]
A new compound, {[Co(bmzbc)(2)]center dot 2DMF}(n) (JXNU-1, JXNU denotes Jiangxi Normal University), based on the 4-(benzimidazole-1-yl)benzoate (bmzbc(-)) ligand has been synthesized and structurally characterized. The Co(II) ions are bridged by the rod-like bmzbc(-) ligands to give a two-dimensional (2D) sheet wherein the Co(II) ions are spatially separated from each other by the long bmzbc- rods. The 2D sheets are further stacked into a 3D framework with ID channels occluding the guest DMF molecules. Detailed magnetic studies show that the individual octahedral Co(II) ions in JXNU-1 exhibit field-induced slow magnetic relaxation, which is characteristic behavior of single-ion magnets (SIMs). The rarely observed positive value of zero-field splitting (ZFS) parameter D for the Co(II) ion in JXNU-1 demonstrates that JXNU-1 is a unique example of Co(II)-based SIMs with easy-plane anisotropy, which is also confirmed by the calculations. The microporous nature of JXNU-1 was established by measuring CO2 sorption isotherms. The abrupt changes observed in the C3H8 and C2H6 adsorption isotherms indicate that a structural transformation occurred in the gas-loading process. The long connection between the magnetic metal centers in JXNU-1 meets the requirements for construction of porosity and SIM in a well-defined network, harmoniously providing a good candidate of functional molecular materials exhibiting SIM and porosity.
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